Air quality in Danville, California, United States of America today

Mr. Duck’s Air Quality Score

Moderate air today for Danville, California, United States of America

⚠️ This website is currently under active development. Some data may be incomplete or temporarily inaccurate. For health-critical decisions, please verify information through official government or environmental sources.

Categories follow US EPA AQI breakpoints for PM (estimate from latest valid measurements; this project does not compute EPA NowCast/24-hour AQI yet).

This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.

Air quality today

The air quality in Danville, California is currently classified as Moderate. The primary pollutant identified is PM2.5 (fine particles), with a measured concentration of 29.905 µg/m³ based on five valid observations reported through OpenAQ.

Data for other pollutants are not available at this time. This page is informational; for health guidance, use official sources such as EPA AirNow or WHO.

Latest sensor values

PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).

What the data includes

The Danville air‑quality feed contains five recent observations from a single monitoring location, and all of the data were recorded at the same moment on 2026‑02‑11 01:00 UTC, which falls within the “updated within 7 days” freshness window. Five pollutants are reported: PM1, PM2.5, relative humidity, temperature and UM003 (particle count). Because each metric has only one recorded value, the minimum, median and maximum are identical for every pollutant, so there is no observed spread in this snapshot.

PM1 measures 17.09 µg/m³, while PM2.5 registers 29.91 µg/m³ at the Danville site. The relative humidity reading stands at 65.05 %, and the temperature is 14.74 °C. Particle concentration captured by UM003 is 2 958.69 particles per cubic centimetre. Since all five parameters share the same timestamp, the dataset offers a perfectly synchronized picture of conditions at that specific time, but it does not reveal how these values vary throughout the day or across different parts of the city.

With only one monitoring station contributing data, coverage is limited to a single point rather than a network spread across Danville. The uniform freshness of the records means the information reflects current conditions, yet the lack of multiple rows or older entries prevents any assessment of temporal trends or spatial differences. Users should keep in mind that air quality can change by location and over time, and this snapshot represents just one moment at one site within the city.

Learn more about sources and filtering: About the data.

Trusted references: WHO (Air pollution) · US EPA AirNow · European Environment Agency (Air)

Latest sensor values (bars)

PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).

Data notes

The data shown for Danville reflects five valid measurements and is updated today, with the most recent reading recorded at 2026‑02‑11T01:00:00+00:00. This snapshot provides a current view of ambient air quality across the city, but conditions can differ by neighborhood and change throughout the day, so values may vary from one location or time to another.

OpenAQ station rows